#a = ['a','b','c','d','e']
#for i in range(len(a)):
#    if i % 2 == 0:
#        a[i] = "love"
#    else:
#        pass
#print(a)

#b = [1,21,310,35,25,6,60,20]
#for i in range(len(b)):
#    if b[i] % 2 == 0:
#        b[i] = "aaa"
#print(b)

#c = [1,2,3,4,5,6,7,8,9]
#for i,j in enumerate(c):
#    if j % 2 == 0:
#        c[i] = 'love'
#    else:
#        pass
#print(c)


aa = ['one','two','three','four']
for i,j in enumerate(aa):
    if i % 2 == 0:
        aa[i] = 'cjcj'
    else:
        pass
print(aa)